content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicReference;
  
  import io.reactivex.common.*;
  import io.reactivex.common.Scheduler.Worker;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.observable.*;
  import io.reactivex.observable.observers.SerializedObserver;
  
  public final class ObservableThrottleFirstTimed<T> extends AbstractObservableWithUpstream<T, T> {
      final long timeout;
      final TimeUnit unit;
      final Scheduler scheduler;
  
      public ObservableThrottleFirstTimed(ObservableSource<T> source,
              long timeout, TimeUnit unit, Scheduler scheduler) {
          super(source);
          this.timeout = timeout;
          this.unit = unit;
          this.scheduler = scheduler;
      }
  
      @Override
      public void subscribeActual(Observer<? super T> t) {
          source.subscribe(new DebounceTimedObserver<T>(
                  new SerializedObserver<T>(t),
                  timeout, unit, scheduler.createWorker()));
      }
  
      static final class DebounceTimedObserver<T>
      extends AtomicReference<Disposable>
      implements Observer<T>, Disposable, Runnable {
          private static final long serialVersionUID = 786994795061867455L;
  
          final Observer<? super T> actual;
          final long timeout;
          final TimeUnit unit;
          final Scheduler.Worker worker;
  
          Disposable s;
  
          volatile boolean gate;
  
          boolean done;
  
          DebounceTimedObserver(Observer<? super T> actual, long timeout, TimeUnit unit, Worker worker) {
              this.actual = actual;
              this.timeout = timeout;
              this.unit = unit;
              this.worker = worker;
          }
  
          @Override
          public void onSubscribe(Disposable s) {
              if (DisposableHelper.validate(this.s, s)) {
                  this.s = s;
                  actual.onSubscribe(this);
              }
          }
  
          @Override
          public void onNext(T t) {
              if (!gate && !done) {
                  gate = true;
  
                  actual.onNext(t);
  
                  Disposable d = get();
                  if (d != null) {
                      d.dispose();
                  }
                  DisposableHelper.replace(this, worker.schedule(this, timeout, unit));
              }
  
  
          }
  
          @Override
          public void run() {
              gate = false;
          }
  
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
              } else {
                  done = true;
                  actual.onError(t);
                  worker.dispose();
              }
          }
  
          @Override
          public void onComplete() {
              if (!done) {
                  done = true;
                  actual.onComplete();
                  worker.dispose();
              }
          }
  
          @Override
          public void dispose() {
              s.dispose();
              worker.dispose();
          }
  
          @Override
          public boolean isDisposed() {
              return worker.isDisposed();
          }
      }
  }
  